عرض شرائح W3.CSS

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نص التسمية التوضيحية

عرض الشرائح اليدوي

يعد عرض عرض الشرائح اليدوي باستخدام W3.CSS أمرًا سهلاً للغاية.

فقط قم بإنشاء العديد من العناصر بنفس اسم الفئة:

مثال

<img class="mySlides" src="img_snowtops.jpg">
<img class="mySlides" src="img_lights.jpg">
<img class="mySlides" src="img_mountains.jpg">
<img class="mySlides" src="img_forest.jpg">

وزرين لتمرير الصور:

مثال

<button class="w3-button w3-display-left" onclick="plusDivs(-1)">❮</button>
<button class="w3-button w3-display-right" onclick="plusDivs(+1)">❯</button>

وإضافة JavaScript لتحديد الصور:

مثال

var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function showDivs(n) {
var i;
var x = document.getElementsByClassName("mySlides");
if (n > x.length) {slideIndex = 1}
if (n < 1) {slideIndex = x.length} ;
for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";
  }
x[slideIndex-1].style.display = "block";
}

شرح JavaScript

أولاً ، قم بتعيين slideIndex إلى 1. (الصورة الأولى)

ثم اتصل بـ showDivs () لعرض الصورة الأولى.

عندما ينقر المستخدم على أحد الأزرار ، قم باستدعاء plusDivs () .

The plusDivs() function subtracts one or adds one to the slideIndex.

The showDiv() function hides (display="none") all elements with the class name "mySlides", and displays (display="block") the element with the given slideIndex.

If the slideIndex is higher than the number of elements (x.length), the slideIndex is set to zero.

If the slideIndex is less than 1 it is set to number of elements (x.length).

Automatic Slideshow

To display an automatic slideshow is even simpler.

You only need a little different JavaScript:

Example

var slideIndex = 0;
carousel();

function carousel() {
var i;
var x = document.getElementsByClassName("mySlides");
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";
  }
slideIndex++;
if (slideIndex > x.length) {slideIndex = 1}
x[slideIndex-1].style.display = "block";
  setTimeout(carousel, 2000); // Change image every 2 seconds
}

HTML Slides

The slides do not have to be images.

They can be any HTML content:

Slide 3

Lorem ipsum

Example

<div class="mySlides">
<div class="w3-container w3-red">
<h1><b>Did You Know?</b></h1>
<h1><i>We plan to sell trips to the moon in the 2020s</i></h1>
</div>
</div>

Slideshow Caption

Snow, Norway

Add a caption text for each image slide with the w3-display-* classes (topleft, topmiddle, topright, bottomleft, bottommiddle, bottomright, left, right or middle):

Example

<div class="w3-display-container mySlides">
<img src="img_snowtops.jpg" style="width:100%">
<div class="w3-display-bottomleft w3-container w3-padding-16 w3-black">
French Alps
</div>
</div>

Slideshow Indicators

An example of using buttons to indicate how many slides there are in the slideshow, and which slide the user is currently viewing.

Example

<div class="w3-center">
<button class="w3-button" onclick="plusDivs(-1)">❮ Prev</button>
<button class="w3-button" onclick="plusDivs(1)">Next ❯</button>

<button class="w3-button demo" onclick="currentDiv(1)">1</button>
<button class="w3-button demo" onclick="currentDiv(2)">2</button>
<button class="w3-button demo" onclick="currentDiv(3)">3</button>
</div>

Another example:

❮

❯

Example

<div class="w3-content w3-display-container">
<img class="mySlides" src="img_nature.jpg">
<img class="mySlides" src="img_snowtops.jpg">
<img class="mySlides" src="img_mountains.jpg">
<div class="w3-center w3-display-bottommiddle" style="width:100%">
    <div class="w3-left" onclick="plusDivs(-1)">❮</div>
    <div class="w3-right" onclick="plusDivs(1)">❯</div>
    <span class="w3-badge demo w3-border" onclick="currentDiv(1)"></span>
    <span class="w3-badge demo w3-border" onclick="currentDiv(2)"></span>
    <span class="w3-badge demo w3-border" onclick="currentDiv(3)"></span>
</div>
</div>

Images as Indicators

An example of using images as indicators:

Example

<div class="w3-content" style="max-width:1200px">
<img class="mySlides" src="img_nature_wide.jpg" style="width:100%">
<img class="mySlides" src="img_snow_wide.jpg" style="width:100%">
<img class="mySlides" src="img_mountains_wide.jpg" style="width:100%">

<div class="w3-row-padding w3-section">
    <div class="w3-col s4">
      <img class="demo w3-opacity" src="img_nature_wide.jpg"
      style="width:100%" onclick="currentDiv(1)">
    </div>
    <div class="w3-col s4">
      <img class="demo w3-opacity" src="img_snow_wide.jpg"
      style="width:100%;display:none" onclick="currentDiv(2)">
    </div>
    <div class="w3-col s4">
      <img class="demo w3-opacity" src="img_mountains_wide.jpg"
      style="width:100%;display:none" onclick="currentDiv(3)">
    </div>
</div>
</div>

Multiple Slideshows on the Same Page

To operate multiple slideshows on one page, you must class the members of each slideshow group with different classes:

Example

<div class="w3-content">
<img class="mySlides1" src="img_snowtops.jpg" style="width:100%">
<img class="mySlides1" src="img_lights.jpg" style="width:100%">
<img class="mySlides1" src="img_mountains.jpg" style="width:100%">
<img class="mySlides1" src="img_forest.jpg" style="width:100%">
</div>

<div class="w3-content">
<img class="mySlides2" src="img_la.jpg" style="width:100%">
<img class="mySlides2" src="img_ny.jpg" style="width:100%">
<img class="mySlides2" src="img_chicago.jpg" style="width:100%">
</div>

Animated Slides

Slide or fade in an element from the top, bottom, left or right of the screen with the w3-animate-* classes.

Example

<img class="mySlides w3-animate-top" src="img_01.jpg">
<img class="mySlides w3-animate-bottom" src="img_02.jpg">
<img class="mySlides w3-animate-top" src="img_03.jpg">
<img class="mySlides w3-animate-bottom" src="img_04.jpg">

Faded Animation

The w3-animate-fading class fades an element in and out (takes about 10 seconds).

Example

<img class="mySlides w3-animate-fading" src="img_01.jpg">
<img class="mySlides w3-animate-fading" src="img_02.jpg">
<img class="mySlides w3-animate-fading" src="img_03.jpg">
<img class="mySlides w3-animate-fading" src="img_04.jpg">

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